Word.ws English Dictionary

social security number

social security number noun: a nine-digit number issued by the Social Security Administration to citizens, permanent residents, and certain temporary workers, primarily to track people for taxation purposes, and in recent years serving as a de facto national identification number.

Noun (1)

social security number (plural social security numbers)

  1. (US) A nine-digit number issued by the Social Security Administration to citizens, permanent residents, and certain temporary workers, primarily to track people for taxation purposes, and in recent years serving as a de facto national identification number.
  2. A corresponding number in other countries.

Noun (2) capitalized: Social Security number

Social Security number (plural Social Security numbers)

  1. Alternative letter-case form of social security number.

Forms of social security number

pluralsocial security numbers
alternative formsocial-security number
alternative formSocial Security number
pluralSocial Security numbers

Questions about social security number

What does social security number mean?
Social security number means a nine-digit number issued by the Social Security Administration to citizens, permanent residents, and certain temporary workers, primarily to track people for taxation purposes, and in recent years serving as a de facto national identification number.
What part of speech is social security number?
Social security number is a noun.
What is the plural of social security number?
The plural of social security number is social security numbers.

Words near social security number in the dictionary

  1. social season
  2. social seasons
  3. social secretaries
  4. social secretary
  5. social security
  6. social security number
  7. social security numbers
  8. social services
  9. social sharing
  10. social skills
  11. social smoker

Source and license

Adapted from Wiktionary: social security number (page history and authors); Social Security number (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “social security number.” Word.ws, https://word.ws/social_security_number. Based on Wiktionary, CC BY-SA 4.0.